Great explanations and intuitions behind basic statistics concepts

alstof

2016-06-01 14:59

Great explanations:

on [covariance](http://stats.stackexchange.com/a/18200);
on [correlation](http://stats.stackexchange.com/a/18089);
on time series [stationarity](http://stats.stackexchange.com/a/19747);
on rule of [unit root](http://stats.stackexchange.com/questions/29121/intuitive-explanation-of-unit-root?lq=1);